Boiler



Oct. 4, 1932.

A. MAGIS ET AL BOILER Filed Jan. 5. 1929 2 Sheets-Sheet l 6i flnfref fi yef INVENTORIF A TTORNE Y.

v Oct. 4, 1932. MAGJS ET A 1,881,206

BOILER Filed Jan. 5. 19 2 Sheets-Sheet 2 A TTORNE Y.

Patented Oct. 4, i932 UNITED srATEs PATENT oFFics' anensrn MAGIS AND AND-an" I-IUET, or rams, FRANCE, ASSIGNOBS to HE surnannn'rnn COMPANY, or NEW YORK, N. Y.

BOILER Application filed January 5, 1929, Serial No. 330,468, and inI Erance January 11,1928.

The present invention has for its object the provision of a steam boiler so operated that thecombustion gases do not change their direction anywhere in their upwardcourse'toward the stack except at the point where they they 6 path. The air flows at first in counter current through a main air heater, which may be metallic, where it is heated and then flows toward the furnace through a set of hollow chambers formed in the boiler walls where it 5 serves to cool these walls and at'the same time to take up the radiant heat from the brick as V chamber or furnace a rise to the tubular work which is in contact with the high temperature gases coming from the furnace. By this means a very complete heat economy i is obtained while at the same time the bricks lining the furnace and coming into contact with the hot gases are better preserved since they are directly cooled by constantly chang ing air. The invention is illustrated in the drawings, in which Fig. 1 is a vertical central section on line y-y of Fig. 2, and Fig. 2 is a vertical section on line 00-00 of Fig. 1.

In Figs. 1 and 2 which give an illustrative embodiment of our invention, the combustion chamber or, furnace a; of the boiler is shown as equipped for pulverized fuel. The Verticaland horizontal walls are lined with water tubes in order to utilize as well as possible the radiant heat of the furnace.

The combustion gases coming from the bundle b lying in the large vertical passage a.

The gases then pass over a superheater c and then over an economizer d both lying in the passage u above the vaporizing bundle I). On leaving the economizer they are subjected to a change in direction indicated by the arrows f'shown in Fig. 2, this change being brought about by the bafiies k and 9'. At the same timethe free cross sectional area is properly altered so that the gases experience a sudden expansion whereby cinders and dust which may have been entrained are dropped in the corners g, 9. These cinders may later on be removed through the open that is to say in a direction opposite to that :eral successive depositions of such Cinders,

ings it provided for this purpose or in any other way, for example by blowing them out with compressed air or steam.

The gases having been thus cleansed proceed toward the air preheaters placed above the passage u at each side of the boiler and finally leave through the passages Z, Z. The airfor supporting the combustion in the furnace enters at the top of the boiler by the orificesm, m, and flows in counter current,

of the gas flow, through the metallic heaters z', i, and flows in a heated condition through the orifices a, a, into the chamber 0. This chamber is in communication with the hollow lateral Walls by means of the orifices The air circulates either freely or along a path determined by balile 1' for example arranged in an inclined manner through the interior of the hollow wall spaces, so as to form a downwardly directed passage from the inlet to the furnace said passage winding around the settingin the interior of the walls. It is thus conducted to the lower part of the combustion chamber from which it is introduced into the furnace through the orifices s.

It'is quite evident that without departing from the scope of the invention, modifications may be introduced in the general arrangement of the parts relatively to each other. Thus, the dust and cinders contained in the gases may be deposited in corners such as g, 9, before the gases pass into contact withan economizer, or there may even be sevfor example one beforethe 'superheater, another before the economizer, etc. 7 The general arrangement of this boiler has the particular advantage that it makes pos sible the use of very simple masonry as illustrated in the drawings, and that'the' walls may be'entirely vertical-without archese'x cept those used 'inthe deposition of the cin ders, The general construction of the boiler is therefore'considerably simplified and the capacities of the several parts of the boiler can be made whatever is desired. Thus, the gas passages can bevaried at will by short} circuiting a portion of the gas cujrrent by 2'5 7 v 7 her and connected to deliver airinto it.-

1 means of simple dampersarranged.either in the center of the tube bundles of the superheater or the otherheat interchangers such as isshown, for example, in thecenter of Fig-Q'at t." i, W We claim: '7 p J ,1: 0 6 comprising in combination a high setting, a furnace in the lower part of the setting, astea'm generator and a steam superheater arranged-in said setting abovethe furnace and so that the gasflow through them is in generally vertical'direction,

chamber'for receiving hot air directly above aportion ofthegeneratOr and superheate'r, V-

meanscooperating withthelower and side sides of said chamberin the vertical'plane which includes said constant horizontal dimension, said passages having eacha hori- Zontal portion anda vertical portio'n forminga sharp angle and arranged to form also a pocket to separate Cinders fromthe gases passing therethrough, and elements for heating air arranged in said passages, said setting having a less 1 horizontal dimension in one direction at the top than at the bottom. 7 i w i i Y AUGUSTE MAGIS.

ANDRE HUET.

walls. of said rchamber to ,givefthe gases -a short horizontal travel followed by a sharp reversal back to a vertical path and adapted to form a pocketat the anglefin thepath of i' the gases whereby solids carried by the gases ed also to. directth'e gases vertically along I the side of said chamberyand air heating means arranged to contact with the gases in their verticalfiow at the side of said cham- 2'. A boiler comprising in combination a V comparatively high setting having a furnace in its lowerportion, a steam generator and a steam superheater directly above a; portion of the furna ce,a chamber for heated air d1- r'ectly above a portion of said superheater and generator, saidchamber and said set;

tingforming passages running one on each side of the chamber, andairheati'ng means 1n each of said passages connected tO'dGllVQI' air into said chamber, said setting having hollow walls provlding passages which are 0011-, nected to said chamberand arranged to deo 3Q Boiler as setforth in claim liver air into said furnace; j

and in which baffle members are arrangedto extend inwardly fromthe setting between the lower face of the airchamber and'the' top of the superheater, j j V g t 1 Boiler having affurnace, a steam generator and a steam superheater arranged to r receive heating gases from said furnace, a

b chamberforhot air arranged directly over as portion of the superheater and generator and a setting for the superheater and gen erator' arranged to form passages, 'one on each slde of the chamber,and conduct ng ver- 7 fticallyvcombustion gases which have passed the superheater, airjheatlng ,means' in said *passagesconnected to deliver air into said chamber,,and connections for leading air 7 from sald chamber into said furnace.

" 15. A boilerhaving a high setting of uni formhOIlZOIltEIlClIHlBIlSlOIl in one direction" and conta ning a furnace, a generator and sujperheater directlyabove-a portion of said fur jnace, a chamber. for heated air directlyab'ove a I ap0rti0ne sai'cl superheater and generator, A 1 passages for: gases of combustion'on' both. 

